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Air Purification Activated Carbon
Published:2017-03-16 15:10:52    Text Size:【BIG】【MEDIUM】【SMALL

Indoor pollutants

As early as in the middle of the last century 60's indoor air pollution already appeared, along with the improvement of people's living standard, decoration industry is rising, the problem of indoor air pollution is becoming more and more serious. Human have 90% of time living and working indoors, which is about 60% of the time at home. According to the survey of relevant international organizations, there are 2.8 million people die directly or indirectly from the decoration pollution around the world each year, 30% new and rebuilt buildings of the world there are indoor air pollution which is harmful to the health, so it is more and more important to purify indoor air. Activated carbon is a kind of excellent adsorbent, has the excellent adsorption capacity to the indoor pollutants.

Main indoor pollutants and their sources

Pollutant

Source

Aerosol

combustion, smoking, people body

Asbestus

heat insulating materials

Formaldehyde

building materials, furniture

CO

combustion, smoking

Microorganism

domestic animal, people body

Ozone

modern electronic office equipment

Tobacco smoke

smoking

Radon

wall and foundation

VOCS

paint, cleaning agents, building materials

CO2

combustion, breath

Allergens

animal, hair, insects, pollen

Ammonia

antifreezer

Benzene series

solvent, polyester fibre, adhesive tape, adhesive, wallpaper, paint, carpet

Activated carbon pore classification

Classification

micropore

mid-hole

big hole

Aperture nm

<2.0

2.0~50

>50

Air Purification Activated Carbon is made of wood, coal or coconut shell, granular or cylindrical appearance. For air purification, the best is coconut shell.

 

The adsorption process of activated carbon

The adsorption characteristics of activated carbon depend on its pore structures and the surface chemical properties, and surface chemical properties determine the chemical adsorption of active carbon. Activated carbon for gas adsorption includes physical adsorption and chemical adsorption, generally both been accompanied by simultaneous. Physical adsorption simply via attractive forces between molecules adsorbs adsorbate on the surface of the adsorbent. Physical adsorption is reversible, reducing adsorbent partial pressure in the gas phase, increasing the adsorption temperature, adsorbent quickly desorption, without changing its chemical composition. Chemical absorption has high selectivity, and a kind of adsorbent only has the effect to the specific substance. Chemical adsorption is irreversible, after adsorption adsorbent has changed the original characteristics.

The difference between physical adsorption and chemical adsorption

 

Physical Adsorption

Chemical Adsorption

Adsorption Temperature

Can’t be far higher than the boiling point of the adsorbate

No connection with the boiling point of the adsorbate

Adsorption Rate

Don't need any activation energy, adsorption rate is very high

Adsorption rate is influenced by activation energy and temperature in a very wide range

Selectivity

No selectivity

Strong selectivity

Adsorption Method

Multimolecular layer adsorption

Monomolecular layer adsorption

 

Application

Air purification activated carbon has big specific surface area, abundant pore structure, high mechanical strength, strong adsorption capacity, easy regeneration. It can efficaciously adsorb methanol, ammonia, radon, benzene, xylene, exhaust gas, lampblack, especially aromatic compound.

Widely used for purification of carbon dioxide, hydrogen, nitrogen, chlorine hydride, ethyne, ethylene, cracking gas, inert gases, atomic equipment; As the packing of antigas mask, poison gas filter; For dropping off air pollutants and classification purification of mixed gas.

Air Purification Activated Carbon

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